Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1bcffcc53ba0b0f0f5087dedb6e217ea95fe6c26971a2a577af4966556b5c65' 
  AND token = '/55hVLFTWD5Mw4epJ1gdKEo15R0ZL93BLjDi5/hK4t8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}